18
FLEX I/O Digital Input and Output Modules w/ Diagnostics
Publication 1794-IN096C-EN-P - August 2015
Specifications – 16 Output Module w/ Diagnostics, 1794-OB16D
Attribute
Value
Number of outputs
16, nonisolated
Recommended terminal base unit
1794-TB2, 1794-TB3, 1794-TB3S
Output voltage, min
10V DC
Output voltage, nom
24V DC
Output voltage, max
31.2V DC
Output current rating
8.0 A (16 outputs @ 0.5 A)
On-state current, min
1.0 mA per channel
On-state current, max
500 mA per channel
Surge current
2 A for 50 ms each, repeatable every 2 seconds
Off-state leakage, max
0.5 mA
Isolation voltage
50V (continuous), Basic Insulation Type
Type tested at 850V DC for 60 s, between field side and system
No isolation between individual channels
Output signal delay
(1)
Off to On
On to Off
0.5 ms
0.5 ms
FlexBus current
60 mA @ 5V DC
Power dissipation, max
4.8 W @ 31.2V DC
Thermal dissipation, max
16.4 BTU/hr @ 31.2V DC
Short circuit protect and detection
Thermal shutdown (auto reset) Detection condition: when
external power active, output signal active, and output port
voltage less than 2V.
Open wire detect off-state leakage
current
0.1 mA – When external power active and output signal inactive.
Detect reverse polarity voltage
Minimum 10V: Module must detect if the reverse polarity
external power supply voltage is greater than the value.
(1)
Delay time is the time from the receipt of an output on or off command to the output actually turning on or off.
